Background Percutaneous Transvenous Mitral Commissurotomy (PTMC) has become the treatment of choice for patients with mitral stenosis. PTMC guided by three-dimensional Transesophageal Echocardiography (3D-TEE) promise of greater safety and efficacy. Case Summary We report a 29-year-old woman who came to our outpatient clinic with shortness of breath as a chief complaint for the past three months. ECG depicted sinus rhythm. Transthoracic Echocardiography (TTE) and 3D-TEE showed severe mitral stenosis with MVA planimetry: 0.8 cm2, MV mean PG 12 mmHg, MV PHT 403 ms, Wilkins score was 4 and no thrombus was found. Therefore, we decided to do PTMC. We successfully done the antegrade transseptal puncture by fluoroscopy guided by two-dimensional (2D) TEE . Then, we used Inoue-balloon catheter No. 24 to dilate the mitral valve. Afterthat, we did 3D-TEE evaluation of the mitral valve area and it showed a significant improvement, with MVA 3D planimetry: 2.0 cm2 and MV mean PG: 4 mmHg and we found moderate mitral regurgitation (MR VC 0.4 cm, MR PISA: 0.3 cm), so we decided to end the procedure. Discussion In this case, the PTMC procedure was carried with 2D and 3D-TEE guiding, where process run more easily because interventionist can ensure the targeted site during transeptal puncture, navigation to the mitral valve and post inflation inspection. 3D-TEE guiding can also directly ensure the success of PTMC in real time by evaluating the MVA planimetry (pre and post PTMC) and the mitral regurgitation.

Background Percutaneous Transvenous Mitral Commissurotomy (PTMC) has become the treatment of choice for patients with mitral stenosis. PTMC guided by three-dimensional Transesophageal Echocardiography (3D-TEE) promise of greater safety and efficacy. Case Summary We report a 29-year-old woman who came to our outpatient clinic with shortness of breath as a chief complaint for the past three months. ECG depicted sinus rhythm. Transthoracic Echocardiography (TTE) and 3D-TEE showed severe mitral stenosis with MVA planimetry: 0.8 cm2, MV mean PG 12 mmHg, MV PHT 403 ms, Wilkins score was 4 and no thrombus was found. Therefore, we decided to do PTMC. We successfully done the antegrade transseptal puncture by fluoroscopy guided by two-dimensional (2D) TEE . Then, we used Inoue-balloon catheter No. 24 to dilate the mitral valve. Afterthat, we did 3D-TEE evaluation of the mitral valve area and it showed a significant improvement, with MVA 3D planimetry: 2.0 cm2 and MV mean PG: 4 mmHg and we found moderate mitral regurgitation (MR VC 0.4 cm, MR PISA: 0.3 cm), so we decided to end the procedure. Discussion In this case, the PTMC procedure was carried with 2D and 3D-TEE guiding, where process run more easily because interventionist can ensure the targeted site during transeptal puncture, navigation to the mitral valve and post inflation inspection. 3D-TEE guiding can also directly ensure the success of PTMC in real time by evaluating the MVA planimetry (pre and post PTMC) and the mitral regurgitation.